Slotted joist seat structure and methods of designing and building the structure

ABSTRACT

The invention relates to panelized system for a structure. The panelized system typically comprises a plurality of joists structured to be operatively coupled to one or more support members of the structure. Each of the plurality of joists are associated with a joist seat comprising a toe and one or more joist apertures. Typically, at least one or more of a plurality of joist seats are operatively coupled to the one or more support members using a toe weld between the toe and the one or more support members. However, an aperture weld between the one or more joist apertures and the support members is omitted. Moreover, a fastener between the one or more joist apertures and the support members is also omitted.

FIELD

This application relates generally to the field of structural deckingsystems, and more particularly to structural roof and/or floor panelsystems for buildings with improved joist seat connections and designand assembly methods thereof.

BACKGROUND

Structural wall, roof, or floor panels (collectively “structuralpanels”) are used in commercial or industrial construction (and in somecases residential construction), for example, in commercial buildings,industrial buildings, institutional buildings, or the like. Structuralpanels, may be typically manufactured from steel sheets, which may ormay not be coiled. In order to increase the structural strength and thestiffness of the individual steel sheets, structural panels withlongitudinal flutes are formed from the steel sheets via roll forming,break forming, bending, stamping, or other like processes. Thestructural panels are secured to each other in order to form astructural panel system when installed (e.g., wall system, roof system,floor system, or combination thereof). The structural panels are alsoconnected to the other load resisting structural support members of abuilding, such as joists, which in turn are secured to support beamsthrough the use of joist seats on the joists. In some situations thejoists may be utilized to form panelized systems that are then liftedonto a structure. These structures formed by panelized systems, orotherwise installed directly on the structures, must resist wind,earthquake (in some locations), or other loading.

BRIEF SUMMARY

Structural panels utilized within a structural panel system of abuilding typically include longitudinal flutes (e.g., upper flange,lower flange, and webs that form a single flute as discussed in furtherdetail later) that extend longitudinally along the length of the panelin order to provide structural strength to the panels, and thus, to thestructural panel system and to the structure. The structural panelstypically comprise two edges and two ends. The edges of structuralpanels extend parallel with the longitudinal flutes, while the ends ofthe structural panels extend perpendicular (or transverse) to thelongitudinal flutes. As such, one edge of the structural panels may bedescribed as a “first edge” (or a “top edge” or “left edge”) while thesecond edge of the structural panels may be described as a “second edge”(or a “bottom edge” or “right edge”). The ends of the structural panelsmay be described as a “first end” (or a “top end” or “left end”) and a“second end” (or a “bottom end” or “right end”). The structural panelsare operatively coupled together (e.g., through sidelaps at the edges,or the like) and to a plurality of joists, which are operatively coupledto support members (e.g., support beams) to form structural deckingsystems. In some embodiments portions of the structural decking systems,called panelized systems (e.g., joists, joist seats, bridging,structural decking panels, or the like), may be assembled before beinghoisted into place.

Embodiments of the present invention relate to a panelized system forstructural decking systems for a structure. The panelized systemtypically comprises a plurality of joists operatively coupled together,which is structured to be operatively coupled to one or more supportmembers (e.g., beams, or the like) of a structure. The plurality ofjoists may comprise a joist seat comprising a toe and one or more joistapertures. As will be described herein, at least one or more of aplurality of joist seats are operatively coupled to the one or moresupport members of the structure using a toe weld between the toe andthe one or more support members. However, aperture connections (e.g.,aperture weld, fastener, or the like) between the one or more joistapertures and the support members are omitted. Moreover, in someembodiments, such as adjacent the ends of support members, the joistseats may be operatively coupled to the one or more support membersusing an aperture connection (e.g., aperture weld, fastener, or thelike), with or without a toe weld, for example, in order to provide thedesired strength to a panelized system.

Specifically, with respect to the one or more joist seats that areoperatively coupled to the one or more support members using only a toeweld and omitting an aperture connection between the one or more joistapertures and the support members, the toe weld may be sized based onthe one or more joist apertures. For example, the at least one toe ofthe joist seat is welded along a predetermined length of anchorage ortoe weld length, which is configured to provide the same (or greater)anchorage, uplift capacity and rollover capacity for the joist seathaving one or more apertures, as would be obtained for unslotted typejoist seats or joist seats whose apertures are welded or otherwiseoperatively coupled to the support members of the structure throughanother aperture connection (e.g., fastener, or the like). Moreover, insome embodiments the toe weld length is greater than the length of theone or more joist apertures.

In some embodiments, a panelized system may be pre-formed beforeinstallation into a structure. The panelized system may include at leasta plurality of joists. In some embodiments, the plurality of joistscomprise a plurality of joist seats having one or more toes and one ormore joist apertures. Typically, at least one of the plurality of joistseats are structured to be operatively coupled to one or more supportmembers of the structure using a toe weld between the one or more toesand the one or more support members. Here, an aperture connectionbetween a joist aperture and a support member is omitted.

In some embodiments each of the joists have joist seats with one or moreapertures, such that any joist may be utilized in any location in thepanelized system for ease of assembly. In some embodiments, theplurality of joists may comprise a first end joist, a second end joistand one or more intermediate joists, which may or may not be assembledwithin a jig to form the panelized system. In some embodiments, bridgingand/or structural decking may be assembled between the joists to createthe panelized systems. As such, the first and second end joists may bestructured to be operatively coupled to opposite ends of each of two ormore support members of the structure (e.g., when the panelized assemblyis hoisted onto the structure). Next, the panelized system may behoisted onto the structure comprising one or more support members. Insome embodiments, the first end joist of the plurality of joists isassembled adjacent a first end of the one or more support members usingone or more end joist seats. Similarly, the second end joist of theplurality of joists may be assembled adjacent a second end of the one ormore support members using the one or more end joist seats. Typically,assembling the first end joist and/or the second end joist comprisesmaking an aperture connection between the one or more end joist seatsand the one or more support. In some embodiments, the one or moreintermediate joists of the plurality of joists are assembled to the oneor more support members between the first end and the second end of theone or more support members using one or more intermediate joist seats.Assembling the one or more intermediate joists comprises welding one ormore toes of the one or more intermediate joist seats of the one or moreintermediate joists to the one or more support members. Moreover, theaperture connection between the one or more joist apertures of the oneor more intermediate joist seats and the one or more support members isomitted.

As such, in some embodiments or in combination with any of the aboveembodiments, the plurality of joists and plurality of joist seatscomprise: two end joists each comprising one or more end joist seats;and one or more intermediate joists each comprising one or moreintermediate joist seats. Typically, the one or more joist apertures ofthe one or more end joist seats are configured for operative coupling tothe one or more support members through the use of the apertureconnection. Moreover, typically the aperture connection between the oneor more joist apertures of the one or more intermediate joists seats andthe one or more support members is omitted.

In some embodiments or in combination with any of the above embodiments,the toe weld length is greater than a length of the one or more joistapertures. As discussed, the toe weld is typically formed after thepanelized system is hoisted onto the structure.

In some embodiments or in combination with any of the above embodiments,the toe weld length is configured to provide at least a predeterminedultimate uplift strength to the at least one or more of the plurality ofjoist seats. Typically the predetermined ultimate uplift strength is theultimate uplift strength obtained if the aperture connection between theone or more joist apertures and the support members is not omitted.

In some embodiments or in combination with any of the above embodiments,the toe weld length is equal to at least about two times the length ofthe one or more joist apertures.

In some embodiments or in combination with any of the above embodiments,bridging is operatively coupled to two or more of the plurality ofjoists.

In some embodiments or in combination with any of the above embodiments,structural decking operatively coupled to the plurality of joists,before, after or during forming the toe weld, as discussed above.

In some embodiments or in combination with any of the above embodiments,a method for forming a structural decking system using a panelizedsystem comprises constructing a panelized system comprising a pluralityof joists, wherein the plurality of joists comprise joist seats havingone or more toes and one or more joist apertures, wherein the pluralityof joists comprises a first end joist, a second end joist and one ormore intermediate joists. Next, the panelized system may be hoisted ontoa structure comprising one or more support members. Subsequently, thefirst end joist of the plurality of joists may be assembled adjacent afirst end of the one or more support members using one or more end joistseats, e.g., by making an aperture connection between the one or moreend joist seats and the one or more support members. Similarly, thesecond end joist of the plurality of joists may be assembled adjacent asecond end of the one or more support members using the one or more endjoist seats, e.g., by making an aperture connection between the one ormore end joist seats and the one or more support members. One or moreintermediate joists of the plurality of joists may also be assembled tothe one or more support members between the first end and the second endof the one or more support members using one or more intermediate joistseats. Typically, this involves welding one or more toes of the one ormore intermediate joist seats of the one or more intermediate joists tothe one or more support members, such that the aperture connectionbetween the one or more joist apertures of the one or more intermediatejoist seats and the one or more support members is omitted.

In some embodiments or in combination with any of the above embodiments,a method for designing a structure comprises determining one or moresupport members for a structure, determining one or more end joists forthe structure having one or more end joist seats having one or morejoist apertures and/or determining one or more intermediate joists forthe structure having one or more intermediate joist seats having the oneor more joist apertures. Moreover, the method further comprisesdetermining a toe weld length for one or more toes of one or moreintermediate joist seats for one or more intermediate joists that allowsfor omission of an aperture connection between the one or more joistapertures of the one or more intermediate joists and the one or moresupport members. As discussed above, typically, the toe weld length isequal to at least about two times a length of the one or more joistapertures.

To the accomplishment of the foregoing and the related ends, the one ormore embodiments of the invention comprise the features hereinafterfully described and particularly pointed out in the claims. Thefollowing description and the annexed drawings set forth certainillustrative features of the one or more embodiments. These features areindicative, however, of but a few of the various ways in which theprinciples of various embodiments may be employed, and this descriptionis intended to include all such embodiments and their equivalents.

BRIEF DESCRIPTION OF DRAWINGS

The foregoing and other advantages and features of the invention, andthe manner in which the same are accomplished, will become more readilyapparent upon consideration of the following detailed description of theinvention taken in conjunction with the accompanying drawings, whichillustrate embodiments of the invention and which are not necessarilydrawn to scale, wherein:

FIG. 1A illustrates a perspective view of a structural decking system100, in accordance with some embodiments of the invention.

FIG. 1B illustrates a cross-sectional view of a structural deckingsystem 100, in accordance with some embodiments of the invention.

FIG. 1C illustrates a cut-away perspective view of a panelized system,in accordance with some embodiments of the invention.

FIG. 1D illustrates a cut-away perspective view of a panelized system,in accordance with some embodiments of the invention.

FIG. 2 illustrates a cross-sectional top view of a joist seat of FIG.1B, in accordance with some embodiments of the invention.

FIG. 3 illustrates a schematic sectional end view of a joist seat, inaccordance with some embodiments of the invention.

FIG. 4 illustrates a schematic left side sectional view of a joist seatillustrated in FIG. 3, in accordance with some embodiments of theinvention.

FIG. 5 illustrates a schematic top sectional view of a joist seatillustrated in FIG. 3, in accordance with some embodiments of theinvention.

FIG. 6 illustrates a left side perspective view of a joist seatillustrated in FIG. 3, in accordance with some embodiments of theinvention.

FIG. 7 illustrates a process flow for a method of forming a panelizedsystem and/or a structural decking system, in accordance with someembodiments of the invention.

FIG. 8 illustrates an end view of a joist seat, in accordance with someembodiments of the invention.

FIG. 9 illustrate a top cross-section view of the joist seat of FIG. 8,in accordance with some embodiments of the invention.

DETAILED DESCRIPTION

Embodiments of the present invention may now be described more fullyhereinafter with reference to the accompanying drawings, in which some,but not all, embodiments of the invention are shown. Indeed, theinvention may be embodied in many different forms and should not beconstrued as limited to the embodiments set forth herein; rather, theseembodiments are provided so that this disclosure may satisfy applicablelegal requirements. Like numbers refer to like elements throughout.

As discussed, “support members” or “support structures”, as used herein,may refer to structural wall, roof, or floor structures or componentsthat are used in construction of buildings or dwellings, such ascommercial or industrial construction, residential construction. In someembodiments, support members refer to one or more of primary supportmembers of a building, such as those that provide support for the floorsand/or ceilings (e.g., beams, joist girders, purlins, masonry walls,concrete walls, cold-formed wall studs, wood load bearing wall studs,trusses, frames, columns and/or the like). Here, the support members maybe manufactured from metals, alloys, non-metals or composites and maycomprise suitable cross-sections, shapes and dimensions.

The support members are secured to each other in order to form a supportsystem when installed (e.g., wall system, roof system, floor system, orcombination thereof). The support members are coupled together throughthe use of a plurality of joists through the use of one or more “joistseats” (also referred to as “joist shoes”) on the joists. In somesituations the joists may be secured to the support members in variousways to form panelized systems that are then lifted onto structureshaving one or more support members. These structures, formed bypanelized systems or otherwise installed directly, must resist wind,earthquake (in some locations), or other loading.

In some embodiments, decking panels are operatively coupled to theplurality of joists. The decking panels are manufactured from steelsheets. In order to increase the structural strength and the stiffnessof the individual steel sheets and the structural decking system,decking panels with longitudinal flutes may be formed from the steelsheets via roll forming, break forming, bending, stamping, or other likeprocesses. Moreover, the decking panels may comprise flutes ofcorrugations of suitable dimensions and corrections (e.g., V-shape,dovetail shape, W-shape, U-shape, or other like profile shape).

The panelized system comprises the plurality of joists, the bridging,and the structural decking panels that may be pre-assembled before beinghoisted and installed into a structure having one or more supportmembers. The panelized system is coupled to the structure (e.g., one ormore support members such as beams, columns, walls, or the like) and/orother panelized systems to form the structural decking system (e.g.,building or the like). The present invention provides optimal (e.g.,equivalent, enhanced, or the like) uplift and rollover capacity forthese panelized systems in particular and the structural decking systemin general, without adding undue time intensive and expensiveconstruction and assembly steps. In particular, in some embodiments, thepresent invention provides the ability to use a single type of joist andjoist seat in the panelized system, and thus in the structural deckingsystem, along with a unique welding process for the intermediate joists,which obviates the need for unwieldy, time intensive and cumbersomesteps of welding or other aperture connection (e.g., using fastenerssuch as bolts, or the like) for the joist seats. In some embodiments,the systems of the present invention provide the same or increaseduplift and rollover capacity in comparison with structures havingaperture connections between the joist seats and the support members,while providing improved assembly. Moreover, in some embodiments, thepresent invention allows for the use of a single type of joist (e.g.,slotted joists, or joists with other types of apertures) through theentire panelized system and/or the structural decking system withouthaving to make connections at each of the one or more joist apertures ofeach of the joist shoes.

FIG. 1A illustrates a perspective view 100A of a panelized system 101for a structural decking system 100, in accordance with some embodimentsof the invention. The structural decking system 100 typically comprisesa structure having one or more support members (not illustrated in FIG.1A) and a panelized system 101 comprising a plurality of joists 16. Insome embodiments, the one or more support members of the structure maycomprise beam type (I-beam) support members (illustrated by FIG. 1B). Insome embodiments, the panelized system 101 comprises a plurality ofjoists 16, a plurality of joist seats 20, one or more structural deckingpanels 14, and/or bridging between the joists (not illustrated).Typically, a pair of the support members may be operatively coupledusing one or more joists 16 extending between the support members,through the use of one or more joist seats 20 for each joist, (e.g.,when the panelized system having the joists 16 is lifted onto thestructure having the support members). The one or more joist seats 20may be suitably oriented, positioned and spaced apart for coupling thepair of the support members to provide the desired structural supportfor decking panels 14 and/or concrete located above the decking panels14. Typically, at least portions of the joist seat(s) 20 are operativelycoupled (using welding, brazing, coupling using fasteners such as bolts,or otherwise attaching, joining or connecting) to one or both of thepair of the support members for coupling the pair of the supportmembers.

Moreover, each of the joist seat(s) 20 may comprise one or more angleportions (22, 24) (e.g., a pair of angle portions (22, 24)) which may beoperatively coupled to each other via a component 18 (e.g., a joist seatplate, portion of one of the joist 16 between them, or the like). Theangle portions (22, 24) may comprise a suitable cross-section, such as asubstantially “C” shape, a “L” shape, a “V” shape, “U” shape, and thelike. In the embodiment illustrated in FIG. 1A, each of the angleportions (22, 24) of the joist seat(s) 20 comprise an “L” shape. Assuch, the angle portions 22 and 24 are operatively coupled to each otherand to an upper chord 26 (e.g., also comprising of two “L” shapedangles, or the like), as will be described in detail with respect toFIGS. 1B-1D below.

The one or more joists 16 each with one or more joist seats 20 (a joistseat on each opposing end of each of the joist seat, or the like) maycomprise one or more end joists 16 a, each positioned adjacent to an endof the one or more support members (e.g., proximate the ends of the eachof the support members). In some embodiments, the one or more end joists16 a, comprise two end joists 16 a each with end joist seats 30positioned at opposite ends of each of the two end joists 16 a. Each ofthe end joists 16 a is operatively coupled to adjacent the ends of thesupport members, through the use of the end joist seats 30. Moreover,the one or more joist seats 20 may further comprise one or moreintermediate joists 16 b each with one or more intermediate joists seats40 on opposite ends of the intermediate joists 16 b. Each of the one ormore intermediate joists 16 b are positioned away from an end of the oneor more support members in comparison with the one or more end joists 16a (e.g., spaced between the end joists 16 a). In other words, a distancebetween an intermediate joist 16 b and an end of a support member may begreater than a distance between an end joist 16 a and an end of thesupport member. As illustrated by FIG. 1A, in the embodiments where theone or more joists 16 comprise two end joist 16 a, the one or moreintermediate joists 16 b are positioned in between the two end joists 16a, and as such the one or more intermediate joist seats 40 arepositioned between the two end joist seats 30.

FIG. 1B illustrates a cross-sectional view 100B of a structural deckingsystem 100, in accordance with some embodiments of the invention. Asdiscussed, the structural decking system 100 typically comprises astructure having one or more support members 10 and a panelized system101 comprising a plurality of joists 16 (illustrated in FIG. 1A). Insome embodiments, the one or more support members 10 of the structurecomprise a first support member 12 and a second support member (notillustrated, located on the opposite end the joists 16). In someembodiments, the first support member 12 and the second support membermay be beam type (I-beam) support members, as illustrated by FIG. 1B. Inother embodiments, the one or more support members 10 may comprise anysuitable support member or a suitable combination of support members(e.g., bricks, concrete, rolled studs, columns, wood, or the like). Insome embodiments, the panelized system 101 comprises a plurality ofjoists 16 (illustrated in FIG. 1A), a plurality of joist seats 20, oneor more structural decking panels 14, and/or bridging between the joists(not illustrated, but may include one or more bridging angles, such assingle angles or multiple angles operatively coupled together, similarto a chord or joist shoe of the joists). Typically, a pair of thesupport members may be operatively coupled using one or more joists 16(illustrated in FIG. 1A) extending between them, through the use of oneor joist seats 20 for each joist (e.g., when the panelized system havingthe joists 16 is lifted onto the structure having the support members).The one or more joist seats 20 may be suitably oriented, positioned andspaced apart for coupling the pair of the support members (or a supportmember and a decking panel 14) to provide the desired structural supportfor decking panels 14 and/or concrete 8 located above the decking panels14 (illustrated in FIG. 1A). As discussed, at least portions of thejoist seat(s) 20 are operatively coupled (using welding, brazing,coupling using fasteners such as bolts, or otherwise attaching, joiningor connecting) to one or more of the support members 10 for coupling thesupport members 12 (e.g., when the panelized system having the joists 16is lifted onto the structure having the support members). In someembodiments, the one or more ends of the joist seat(s) 20 maybeoperatively coupled (e.g., welded) to one or more of the support members10. In some embodiments, the one or more ends of the joist seat(s) 20are operatively coupled (e.g., welded) to the support member(s) 12 at aninterface formed between a portion of a joist seat 20 and acorresponding adjacent portion of a support member 12, such as at aninterface formed where a surface or an edge (e.g., toe 42) of the joistseat 20 contacts or meets a surface of the corresponding support member12.

Moreover, each of the joist seat(s) 20 may comprise one or more angleportions (22, 24) (e.g., a pair of angle portions (22, 24)) which may beoperatively coupled to each other via a component 18 between them. Thecomponent 18 may refer to a seat plate, a portion of a joist 16 (e.g., aweb, a chord, or another component), or the like. The angle portions(22, 24) may comprise a suitable cross-section, such as a substantially“C” shape, a “L” shape, a “V” shape, “U” shape, and the like. In theembodiment illustrated in FIG. 1B, each of the angle portions (22, 24)of the joist seat(s) 20 comprise an “L” shape, as indicated by DetailA-A. As such, the angle portions 22 and 24 are operatively coupled toeach other and to an upper chord 26 (e.g., also comprising of two “L”shaped angles, or the like) via the component 18. The angle portions 22and 24 may be operatively coupled to the support member 12 through atleast a point of contact. In other embodiments not illustrated herein,the angle portions 22 and 24 of the joist seat(s) 20 may comprise a “C”shape. Here, the angle portions 22 and 24 may be operatively coupled toeach other via the component 18, and operatively coupled to the supportmember(s) 12 proximate the point of contact.

As discussed above, the one or more joists 16 each with one or morejoist seats 20 (a joist seat on each end) may comprise one or more endjoists 16 a with one or more joist seats 30 (illustrated in FIG. 1A),each positioned adjacent to an end of the one or more support members 10(e.g., proximate the ends of the each of the support members 10). Insome embodiments, the one or more joists 16, comprise two end joists 16a each with an end joist seat 30 positioned at opposite ends of each ofthe two end joists 16 a (illustrated in FIG. 1A). Each of the end joists16 a (illustrated in FIG. 1A) are operatively coupled to adjacent theends of the support members 10, through the use of the end joist seats30, as illustrated by FIG. 1B. Moreover, the one or more joist seats 20may further comprise one or more intermediate joists 16 b (illustratedin FIG. 1A) each with one or more joists seats 40 on opposite ends ofthe intermediate joists 16 b. Each of the one or more intermediatejoists 16 b are positioned away from an end of the one or more supportmembers 10 in comparison with the one or more end joist 16 a (e.g.,between the end joists 16 a). In other words, a distance between anintermediate joist 16 b and an end of a support member 10 may be greaterthan a distance between an end joist 16 a and an end of the supportmember 10. In the embodiments where the one or more joist 16 comprisetwo end joist 16 a, the one or more intermediate joist 16 b arepositioned in between the two end joist 16 a, and as such the one ormore intermediate joist seats 40 are positioned between the end joistsseats 30. As used herein, unless otherwise specified, one or more joistseats 20 (or joist seat 20) may refer to one or more end joist seats 30and/or one or more intermediate joist seats 40.

In conventional structure assemblies, the end joist seats may be slottedtype joist seats that comprise one or more joist apertures 48 (e.g.,circular apertures, square apertures, or slotted apertures of differentshapes, such as oval, rectangular, or the like) while the intermediatejoist seats are unslotted type joist seats which do not comprise the oneor more joist apertures. Both of the slotted type and unslotted typejoist seats are required to be welded at their end portions or edges tocouple the joist seats with the one or more support members. Moreover,the joist apertures of the end joist seats 30 are typically required foroperatively coupling the end joist seat adjacent an end of structuresupport member(s) 12, using fasteners such as bolts, studs and nuts, orthe like. Employing these different types of joist seats exacerbates thecomplexity and costs of the structure and the time it takes to assemblethe structure, such as the pre-assembled panelized systems. For example,the different types of joists (e.g., slotted, unslotted) must bemanufactured and shipped, and during assembly, the correct joists mustbe located in the correct locations of the structure, such as within thepre-formed panelized system. Hence, it is advantageous to employ asingle type of joist seat 20 on each of the joists 16 throughout thestructural decking system. However, employing joist seats with one ormore joist apertures (e.g., slotted type joist seats) at theintermediate joist seats locations, adversely affects the upliftcapacity and roll over capacity of the structure assembly, particularlydue to the lack of anchorage at the joist apertures (e.g., at theslotted apertures in the intermediate joists). Accordingly, if joistseats 20 with one or more joist apertures are utilized as intermediatejoist seats in conventional systems, it would necessitate operativelycoupling (e.g., by welding and/or fastening) each of the one or moreapertures of each of the joist seats 20 to the corresponding supportmember, to provide the required uplift anchorage. However, the apertures(e.g., slots, or the like), particularly those in the intermediate joistseat 40 locations, are difficult to access and maybe unreachable for thecoupling tools (e.g., welding tools, pneumatic or hydraulic wrenches, orthe like) making the operative coupling of the intermediate joist seat40 to the support members 10 through the one or more joist apertureschallenging, if not impossible. For instance, Region B of FIG. 1Billustrates an intermediate joist seat 40 having one or more joistapertures 44 (e.g., multiple apertures on a side and/or on both sides ofthe joist seat 20), such as a slotted joist seat type having one or moreslotted apertures. As illustrated, the arrangement of the structuraldecking system 100 itself and the structural decking panel(s) 14 inparticular, at least partially cover and obscure one or more joistapertures 44. Operatively coupling the aperture(s) 44 to the supportmember 12 (e.g., by welding) at the interface portions 48 may bechallenging, because of the lack of access and lack of maneuverabilityof certain coupling tools/devices in the narrow confined space at andaround the aperture(s) 44 (particularly in the instances where thestructural decking 14 is assembled prior to welding). Moreover,operatively coupling (e.g., by welding and/or fastening) each of the oneor more apertures of each of the slotted type joist seats, even ifpossible (e.g., due to the configuration of the joist seat and/orbecause of installed decking), again adds to the complexity, timeconsumption and costs of assembling the structure.

The present invention alleviates the above drawbacks and providesadditional advantages, as will be described herein. Embodiments of thepresent invention provide the required anchorage, uplift capacity androllover capacity for the panelized system, without requiring operativecoupling of the joist apertures of the intermediate joist seats 40 andwithout requiring use of unslotted type joist seats (e.g., a single typeof joist seat may be utilized throughout the structural decking system100). Moreover, in some embodiments, the present invention allows foruse of the same type of joist seats (e.g., slotted type joist seats)uniformly for the panelized system without adversely affecting theanchorage, uplift capacity and rollover capacity of the panelizedsystem, and in some embodiments improving the anchorage, uplift capacityand rollover capacity.

Returning to FIG. 1B, each of the one or more joist seats 20 of thepanelized system typically comprise at least one toe 42. For example,each of the angled portions (22, 24) comprises a toe 42. The toe 42 maycomprise an edge of the angled portion (22, 24). The one or more joistseats 20 are positioned or arranged such that a surface of the toe 42 issubstantially perpendicular with the corresponding support member 12,such that at least a portion of the toe 42 contacts a surface of thesupport member 12. As illustrated by FIG. 1B, each of the one or morejoist seats 20 and particularly the one or more angled portions (22, 24)of the joist seats 20 may comprise one or more joist apertures 44 (e.g.,slots, or the like). However, it is contemplated that in alternativeembodiments the one or more joist seats 20 may comprise more or fewerapertures than those illustrated herein (e.g., multiple apertures oneach angle, or a single aperture on one angle and no aperture on anadjacent angle). Each joist aperture 44 may comprise an aperture depth“Tj”, which may be the same as a thickness of the angled portion (22,24). The present invention provides a unique joist seat design andmethod of coupling which provides the required anchorage, upliftcapacity and rollover capacity for the panelized system (or improvesupon the forgoing) by uniquely operatively coupling the joist seat(s) 20at toe(s) 42 (or at least one toe 42), without requiring operativecoupling at the one or more joist apertures 44 (e.g., welding atportions 48 of the aperture(s) 44, or the like) of the intermediatejoists 16 b. The one or more joist seats 20 will be described in detailwith respect to section C-C illustrated in FIG. 2.

FIG. 1C illustrates a cut-away perspective view 100C of a structuraldecking system 100, in accordance with some embodiments of theinvention. As discussed, each of the joist seat(s) 20 may comprise oneor more angle portions (22, 24) (e.g., a pair of angle portions (22,24)) which may be operatively coupled to each other via a component 18(e.g., a portion of a joist 16, a seat plate, or the like) between them.In the embodiment illustrated in FIG. 1C, each of the angle portions(22, 24) of the joist seat(s) 20 comprise an “L” shape. The angleportions 22 and 24 are operatively coupled to an upper chord 26 (e.g.,also comprising of two “L” shaped angles, or the like). Moreover, a webof the joist 16 is used to operatively couple the angles of the upperchord 26, and in some embodiments the angle portion 22 and 24 of thejoist seat 20. As illustrated by FIG. 1C, an end portion of an “L”shaped angle of the upper chord 26 may overlap over a portion of acorresponding angle portion (22, 24) of the joist seat 20.

FIG. 1D illustrates a cut-away perspective view 100D of a structuraldecking system 100, in accordance with some embodiments of theinvention. As discussed, each of the joist seat(s) 20 may comprise oneor more angle portions (22, 24) (e.g., a pair of angle portions (22,24)) which may be operatively coupled to each other via a component 18(e.g., a portion of the joist 16) between them. In the embodimentillustrated in FIG. 1D, each of the angle portions (22, 24) of the joistseat(s) 20 comprise an “L” shape. Here, the angle portions 22 and 24 areoperatively coupled to each other and to an upper chord 26 (e.g., alsocomprising of two “L” shaped angles, or the like) via the component 18.As illustrated by FIG. 1D, an end portion of an “L” shaped angle of theupper chord 26 may be spaced apart from an end portion of acorresponding angle portion (22, 24) of the joist seat 20, via thecomponent 18.

FIG. 2 illustrates a cross-sectional view 200 of a joist seat 20 withrespect to section C-C of FIG. 1B, in accordance with some embodimentsof the invention. As discussed, joist seat 20 comprises one or moreangle portions such as angle portion 22 having a toe 42 and one or morejoist apertures, such as joist aperture 44. The angle portion 22 of thejoist seat 20 comprises a length “Lj” and a width “Wj” (described indetail with respect to FIG. 3). The aperture 44 has a length “La” and awidth “Wa”. In some embodiments, the length La of the aperture 44 may beabout 2 inches, in the range of about 1-2 inches, 1-5 inches, 2-6inches, 0.5-10 inches, or outside, or in-between, or overlapping theseranges or any number within these ranges. In some embodiments, the widthWa of the aperture 44 may be about 0.56 inch, in the range of about0.1-1 inch, 0.2-0.7 inch, 0.1-2 inches, 0.4-3 inches, 0.5-10 inches oroutside, or in-between, or overlapping these ranges, or any numberwithin these ranges. As discussed previously, the present inventionprovides a unique joist seat design and method of coupling whichprovides the required anchorage, uplift capacity and rollover capacityfor the panelized system by uniquely operatively coupling the joistseat(s) 20 at least along a portion of a length of the toe 42, withoutrequiring operative coupling at the one or more apertures 44 (e.g.,welding at portions 48 of the aperture(s) 44). As such, the angleportion 22 may be welded with a weld 60 or otherwise operatively coupledalong a predetermined length of anchorage “Lw” (also referred to as a“predetermined length of weld” or “toe weld length”) of the toe 44. Thepredetermined length of anchorage or toe weld length Lw is configured toprovide the same (or greater) anchorage, uplift capacity and rollovercapacity, without requiring operative coupling at the aperture 44, asthat would be obtained if the aperture 44 was operatively coupledinstead. The design and configuration of the predetermined length ofanchorage or toe weld length Lw will be described below.

FIG. 3 illustrates a schematic sectional view 300 of a joist seat 20, inaccordance with some embodiments of the invention. The sectional view300 also depicts a schematic free body diagram representing loading ofthe joist seat 20 in accordance with some embodiments of the invention.The joist seat 20, in accordance with these embodiments, comprises apair of angle portions (22, 24), each having a toe 42. The angleportions 22 and 24 are operatively coupled to each other via thecomponent 18. The angle portions (22, 24) comprise a substantially “L”shaped cross section formed by first portions (22 a, 24 a) and secondportions (22 b, 24 b), respectively, as illustrated by FIG. 3. The firstportions (22 a, 24 a) and second portions (22 b, 24 b) form an anglesuch as a right angle, angles in the range of 80-90 degrees, 60-100degrees, and the like, or outside, or in-between, or overlapping theseranges or any number within these ranges. However, as discussedpreviously, in other embodiments not illustrated herein, the angleportions (22, 24) may comprise other suitable cross-sections, such as asubstantially “C” shape, a substantially “U” shape, a “V” shape, and thelike. As illustrated in FIG. 3, each of the angle portions 22 and 24 ofthe joist seat 20 may comprise a width “Wj”, a height “Hj”, a length“Lj” (illustrated in FIG. 2) and a thickness of “Tj”. In someembodiments, the width Wj may be about 2 inches, in the range of about1-2 inches, 2-5 inches, 1-8 inches, 2-10 inches, 2-12 inches, oroutside, or in-between, or overlapping these ranges, or any numberwithin these ranges. In some embodiments, the height Hj may be about 2inches, in the range of about 1-2 inches, 2-5 inches, 1-8 inches, 2-10inches, 2-12 inches, 2-20 inches, or outside, or in-between, oroverlapping these ranges, or any number within these ranges. In someembodiments, the length Lj (illustrated in FIG. 2) may be about 1.5inch, 3 inches, 10 inches, in the range of about 1-2 inches, 2-5 inches,2-8 inches, 2-10 inches, 2-20 inches, 2-24 inches, or outside, orin-between, or overlapping these ranges, or any number within theseranges. In some embodiments, the thickness Tj may be about 0.1 inch,0.13 inch, 0.15 inch, 0.19 inch, 0.25 inch, 0.5 inch, in the range ofabout 0.01-0.5 inch, 0.01-1 inch, 0.01-2 inches, 0.05-2 inches, 0.05-3inches or be outside, or in-between, or overlapping these ranges, or anynumber within these ranges.

In the embodiments where the joist seat 20 has one or more joistapertures, one or both of the angle portions (22, 24) comprise at leastone aperture 44 having a length “La”, a width “Wa” (illustrated in FIG.2) and an aperture depth “Tj”, as illustrated in FIG. 2. In someembodiments, the length La of the aperture 44 may be about 2 inches, inthe range of about 1-2 inches, 1-5 inches, 2-6 inches or outside, orin-between, or overlapping these ranges, or any number within theseranges. In some embodiments, the width Wa of the aperture 44 may beabout 0.56 inch, in the range of about 0.1-1 inch, 0.2-0.7 inch, 0.1-2inches, 0.4-3 inches or outside, or in-between, or overlapping theseranges, or any number within these ranges. In some embodiments, theaperture depth Tj is same as the thickness of the angle portion, whilein other embodiments it may vary. As such, the aperture depth Tj may beabout 0.1 inch, 0.13 inch, 0.15 inch, 0.19 inch, 0.25 inch, 0.5 inch, inthe range of about 0.01-0.5 inch, 0.01-1 inch, 0.01-2 inches, 0.05-2inches, 0.05-3 inches or be outside, or in-between, or overlapping theseranges, or any number within these ranges.

Typically, load “P” of FIG. 3 represents the ultimate uplift loadrequired for the first portions (22 a, 24 a) of the angle portions (22,24) (e.g., portions proximate the toe 42 or portions operatively coupledto a support member at a region of contact) to yield under the loadingP. The force components “P” and “P/2” and their directions asillustrated by FIG. 3 indicate the load balance such that net force iszero. The ultimate uplift load “P” is described in detail below.

FIG. 4 illustrates a schematic left side sectional view 400 of the joistseat 20 illustrated in FIG. 3, in accordance with some embodiments ofthe invention. Specifically, FIG. 4 indicates a length K along which thetoe 42 of the angle portion 22 is operatively coupled with acorresponding support member by a weld 160. The length “a” indicates thelength of the moment arm when the ultimate uplift load P is applied tothe joist seat 20 in accordance with FIGS. 3 and 4. The length “a” mayalso me defined as a distance between a yield line due to the loadingand the toe 42. In some embodiments, length K refers to a length of weldfor unslotted type joist seats or joist seats whose apertures are notwelded or otherwise operatively coupled (described below) which isrequired to provide a predetermined uplift capacity P, in other words,withstand an ultimate uplift load P. In some embodiments, the length Krefers to a predetermined length of weld.

FIG. 5 illustrates a schematic top sectional view 400 of the joist seat20 illustrated in FIG. 3, in accordance with some embodiments of theinvention. Specifically, FIG. 5 indicates a top view of the angleportion 22 being operatively coupled with a corresponding support memberby the weld 160 along the length K of the toe 42. As discussed, thelength “a” indicates the length of the moment arm when the ultimateuplift load P is applied to the joist seat 20 in accordance with FIGS. 3and 4. FIG. 5 also indicates the yield line along which the angleportion 22 of the joist seat 20 would yield under the ultimate upliftload P.

Referring to FIGS. 3-5, the ultimate uplift load P is determined to bedirectly proportional to a product of a plastic moment capacity per unitlength “M” of the angle portion 22 and a length “Ly” of the yield line.Moreover, the ultimate uplift load P is inversely proportional to thelength of the moment arm “a”. Hence, by conservation of momentum, theultimate uplift load P can be determined as:

$P = {2\frac{(M)({Ly})}{(a)}}$

Here, it is noted that the plastic moment capacity per unit length M canbe determined to be equal to a product of yield stress “Y” of a materialfrom which the angle portion 22 is constructed (e.g., steel) and aplastic section modulus of unit length “Z” of the angle portion 22. Forexample, yield stress Y of steel may be about 55.7, 57, 58, 60.3, 50-65,36-80, 50-85 ksi (kilopounds per square inch); 55700, 57100, 58000,60300, 50000-65000, 36000-80000 psi (pounds per square inch); oroutside, or in-between, or overlapping these ranges, or any numberwithin these ranges. Moreover, the plastic section modulus of unitlength Z is typically equal to a fourth of a square of the thickness Tjof the angle portion 22. Hence, the plastic moment capacity per unitlength M can be determined as:

${M = {(Y)(Z)}},{Z = \frac{({Tj})^{2}}{4}}$

The plastic section modulus of unit length Z may be about 0.0042, 0.005,0.0009, 0.01, 0.016, 0.005-0.016, 0.005-0.02, 0.002-0.02, 0.002-0.1,0.002-3 square inches or outside, or in-between, or overlapping theseranges, or any number within these ranges. Moreover, the plastic momentcapacity per unit length M may be about 0.2, 0.35, 0.5, 0.9, 0.2-0.9,0.1-1.5, 0.26-0.9, 0.1-2 kip-in, or outside, or in-between, oroverlapping these ranges, or any number within these ranges. Moreover,it is noted that the length Ly of the yield line can be determined to bethe lesser of (i) a sum of the length of weld K and perimeter of thecurvature with radius a, i.e., (K+πa) and (ii) the length Lj of theangle portion 22 of the joist shoe/seat 20. The determination of “a” anda unique predetermined length of anchorage or toe weld length Lw that isconfigured to provide the same or greater anchorage, uplift capacity androllover capacity, without requiring operative coupling at the aperture44, as that would be obtained if the aperture 44 was operatively coupledinstead or if aperture 44 was not present, is described below withrespect to FIG. 6.

FIG. 6 illustrates a left side perspective view 600 of the joist seat 20illustrated in FIG. 3, in accordance with some embodiments of theinvention. Specifically, FIG. 6 indicates a first scenario with a length“a1” of the momentum arm and the corresponding yield line A that wouldresult when an unslotted type angle portion 22 (or otherwise an angleportion 22 without an aperture), welded along a length K of toe 42 to acorresponding support member is subject to a ultimate uplift load P.FIG. 6 also indicates a second scenario with a new length “a2” of amomentum arm and the corresponding yield line B that would result when aslotted type angle portion 22 (with aperture 44) welded along the lengthK and omitting welding in the aperture is subject to the ultimate upliftload P.

In the first scenario involving an unslotted type angle portion 22, itis understood that “unslotted” herein refers to either (i) the angleportion 22 without the aperture 44 or (ii) the aperture 44 of the angleportion 22 also being welded to the corresponding support member alongthe opening and/or the interface 48 of the aperture 44, in addition tothe weld along length K prior to loading. Here, the length a1 of themomentum arm for the unslotted type angle portion 22 is configured toprovide a yield line length that predicts the ultimate uplift strengthof unslotted type angle portions/joist seats (e.g., when calculated inaccordance with the ultimate uplift load P formulation described above).It is noted that, the length a1 of the momentum arm for the unslottedtype angle portion 22 is determined to vary in direct proportion withthe thickness Tj of the angle portion 22 by a factor of a constant equalto 2.3, based on experimental data at least in part:(a1)=2.3(Tj)

Now referring to the second scenario involving a slotted type angleportion having an aperture 44, as discussed earlier, the ultimate upliftstrength is inversely proportional to the length of the moment arm.Moreover, slotted type joist seats with angle portions havingaperture(s) 44 would have a reduced ultimate uplift strength (i.e.capacity to withstand the ultimate uplift load) due to the larger momentarm a2 in comparison with the length a1 of the momentum arm for theunslotted type. It is contemplated that the ultimate uplift strength ofthe slotted type angle portions would approach that of an unslotted typeas the weld length increases. Here, as the weld length and ultimateuplift strength increase, it is determined that the length of the momentarm a2 would decrease from a maximum value until it reaches the value ofthat of the unslotted type, as a function of the thickness Tj. This isso because, typically, the ultimate uplift strength of the slotted typemay be less than or equal to that of the unslotted type. Specifically,it is determined that, as the weld length and ultimate uplift strengthincrease, the length of the moment arm a2 would decrease with respect toƒ(x)(T j) until it reaches the value of that of the unslotted type,i.e., a1=2.3 (Tj). Here, ƒ(x) refers to a determined function ofvariable x, which is a ratio of the length of the weld “K” and thelength of the aperture “La”. The function ƒ(x) is determine to be:

${{f(x)} = \left( {C - {0.25x^{2}}} \right)},{x = \frac{(K)}{({La})}}$

Here, the ratio x of ratio of the length of the weld “K” and the lengthof the aperture “La” may be about 0.5, 0.6, 0.8, 1, 1.25, 1.5, 0.5-1.6,0.2-2, 0.1-1.8, 0.2-1.6, 0.5-3, or outside, or in-between, oroverlapping these ranges, or any number within these ranges. Moreover,“C” is a constant that may be experimentally determined based ontesting. Hence, the length of the moment arm a2 for a slotted type angleportion having aperture(s) is determined to vary as:(a2)=(C−0.25x ²)(Tj)

It is further determined, based at least in part on experimentaltesting, that the constant C has a value of about 4.26. However, theconstant C may be about 1, 2, 3, 3.2, 3.5, 3.6, 3.8, 3.9, 4.0, 4.1, 4.2,4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.2, 5.5, 6, 7, 8, or outside,or in-between, or overlapping these ranges (e.g., 3.5-5, 4.0-4.5, or thelike), or any number within these ranges Hence, the length of the momentarm a2 for a slotted type angle portion having aperture(s) is determinedto be the maximum of:

$\left( {a\; 2} \right) = \left. \max \middle| \begin{matrix}{\left( {C - {0.25x^{2}}} \right)({Tj})} \\{2.3({Tj})}\end{matrix} \right.$

In some embodiments, the length of the moment arm a2 for a slotted typeangle portions may be about 0.5, 0.6, 0.7, 0.8, 1, 1.2, 1.5, 2 inches,in the range of 0.52-1.07, 0.4-2, 0.5-1.02, 0.52-1.07, 0.5-0.79,0.8-1.05, 0.5-3 inches, or outside, or in-between, or overlapping theseranges, or any number within these ranges.

Hence, based on the length of the moment arm a2 for a slotted type angleportion above, the predetermined length of anchorage “Lw”(“predetermined length of weld” or “toe weld length”) of the toe 44which is configured to provide the same (or greater) anchorage, upliftcapacity and rollover capacity for slotted type angle portions, as thatwould be obtained for unslotted type angle portions (e.g., no aperturewithin the angle portion, or for an angle portion whose slots are weldedor otherwise operatively coupled to the support member), can bedetermined to be at least about (2(a2)+K). In some embodiments, thepredetermined length of anchorage Lw or toe weld length Lw is determinedto be at least about (2(a2)+(La)). As such, typically, the predeterminedlength of anchorage or toe weld length Lw is greater than the length Laof the joist aperture 44. In some embodiments, the predetermined lengthof anchorage Lw or toe weld length Lw is determined to be greater thanor equal to the length of the aperture La and lesser than or equal tothe length of the angle portion/joist seat Lj.

Accordingly, in some embodiments, the predetermined length of anchorage“Lw” (“predetermined length of weld” or “toe weld length”) of the toe 44which is configured to provide the same (or greater) anchorage, upliftcapacity and rollover capacity for slotted type angle portions, as thatwould be obtained for unslotted type angle portions (e.g., no aperturewithin the angle portion, or for an angle portion whose slots are weldedor otherwise operatively coupled to the support member), can bedetermined to be at least about a factor of the length of the apertureLa. Specifically, the predetermined length of anchorage Lw can bedetermined to be about 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9,3, 3.1, 3.2, 3.3, 3.4, or 3.5 times the length of the aperture La or inthe range of 2 to 3.5, 2.2 to 3.5, 2 to 4, 1.8 to 4 times the length ofthe aperture La. That is, the predetermined length of anchorage Lw andthe length of the aperture La,

$\frac{Lw}{La},$can be can be determined to be about any of the above values, or rangewithin, outside, or overlap any of the above values. In some instances,the predetermined length of anchorage Lw can be determined to be about2-3.5 times the length of the aperture La, i.e., 2(La)≤Lw≤3.5 (La). Insome instances, the predetermined length of anchorage Lw can bedetermined to be about 2.8 times the length of the aperture La, i.e.,Lw≥2.8(La). In some instances, the predetermined length of anchorage Lwcan be determined to be about at least twice the length of the apertureLa, i.e., Lw≥2 (La). In some embodiments, the predetermined length ofanchorage Lw can be determined to range between (i) around about atleast twice the length of the aperture La and (ii) around about thelength Lj of the angle portion 22 of the joist seat 20, i.e.,2(La)≤Lw≤Lj.

Accordingly, the predetermined length of anchorage “Lw” (“predeterminedlength of weld” or “toe weld length”) of the toe 44 is configured suchthat it provides the same (or greater) anchorage, uplift capacity androllover capacity for slotted type angle portions, as that would beobtained for unslotted type angle portions (e.g., no aperture within theangle portion, or for an angle portion whose slots are welded orotherwise operatively coupled to the support member), while allowingease of and access for welding, and providing reduced time, costs andmaterial requirements for the assembly.

Hence, for a slotted type angle portion having an aperture 44 which isnot welded or otherwise operatively coupled or fastened, the ultimateuplift capacity P can be determined using the relation above withrespect to an increased yield line length Ly for the slotted type angleportion and with respect to the larger moment arm a2 described above, asfollows:

$P_{slotted} = {2\frac{(M)({Ly})_{slotted}}{\left( {a\; 2} \right)}}$

In some embodiments, the length of anchorage Lw or toe weld length Lw isstructured to provide an ultimate uplift capacity of about 3.54, 4.12,5.73, 6, 7.7, 9.54, 10.3, 11.6, 15 kip (kilo pound force) in the rangeof 2.7-11.6, 9.54-11.6, 6-15, 9-15, 8-20, 7-12 kip (kilo pound force),or outside, or in-between, or overlapping these ranges, or any numberwithin these ranges.

FIG. 7 illustrates a high level process flow 700 for a method of formingone or more panelized systems 101 and/or a structural decking system 100form the one or more panelized systems 101. As discussed, the structuraldecking system 100 typically comprises a structure having one or moresupport members 10 and one or more panelized system 101 comprising aplurality of joists 16 (illustrated in FIG. 1A). In some embodiments,the one or more support members of the structure may comprise beam type(I-beam) support members (illustrated by FIG. 1B). In some embodiments,the panelized system comprises a plurality of joists 16 (illustrated byFIG. 1A), a plurality of joist seats 20 (illustrated by FIG. 1A-FIG. 6),one or more structural decking panels 14 (illustrated by FIGS. 1A-1B),and/or bridging between the joists (not illustrated). Typically, ingeneral, the method involves forming a structural decking system 100 byconstructing the one or more panelized systems 101 and assembling theone or more panelized systems 101 with one or more of the supportmembers of the structure. In some embodiments, at least some of theplurality of joists 16 are assembled using one or more jigs to form thepanelized system 101. Here, at least some of the plurality of joists 16are typically panelized in a jig, such that the joists are positionedand situated in locations that would correspond to support members of astructure when the panelized system is lifted onto the structure.Typically, each of the joists are associated with a joist seat 20comprising angle portions (22, 24), at least one toe 42 and at least oneaperture 44, as described previously.

As indicated by block 710, the method involves constructing a panelizedsystem comprising a plurality of joists 16. The plurality of joists 16comprise end joists (e.g., a first joist, a second joist) and one ormore intermediate joists. Specifically, the first joist may be anend-type joist having one or more end joist seats 30 and may beconfigured to be assembled at a first end of the one or more supportmembers 10 (e.g., when the panelized system having the joists 16 islifted onto the structure having the support members). The second joistmay be an end-type joist having one or more end joist seats 30 and maybe assembled at a second end (e.g., an end opposite the first end) ofthe one or more support members 10. The one or more intermediate joistsmay be a third, fourth, fifth, six, seventh, and/or the likeintermediate joists having one or more intermediate joist seats 40 andmay be configured to be assembled between the first end and the secondend of the one or more support members 10 between the end joists.

In some embodiments, the plurality of joists are typically assembled(i.e., positioned, situated, or at least partially coupled) within a jigfor forming the panelized system 101. In some embodiments, typically,the first joist is assembled (i.e., positioned, situated, or at leastpartially coupled) within the jig. In some embodiments, the second joistis assembled (i.e., positioned, situated, or at least partially coupled)within the jig, e.g., along with the first joist. In some embodiments,the one or more intermediate joists may be assembled (i.e., positioned,situated, or at least partially coupled) by positioning or situatingeach of the intermediate joists within the jig, e.g., between the firstjoist and the second joist, within the jig. The jig may allow for properpositioning of the joists 16 as they will be installed on the structure.

In accordance with embodiments of the present invention each of the endjoists and intermediate joists have joist seats with one or more joistapertures. In this way, during manufacturing different joists withdifferent joist seats do not have to be produced and/or inventoried.Moreover, having the same type of joists 16 with the same joist seats 20allows for the use of any type of joist 16 in any location whenassembling each of the joists 16 to the panelized system and/orstructural decking system. As such, the costs associated withmanufacturing and assembling the panelized systems is reduced becausedifferent joists with different joist seats do not have to be producedand/or assembled.

It should be understood that in some embodiments different types ofjoists may be required in different locations within the structure, suchas joists that are assembled over columns in the building. For example,column joists may have different structural requirements when comparedto joists that are not located at columns. These joists that may berequired at column locations may be either end joists or intermediatejoists depending on where each panelized system 101 is being installedin the structure. As such, some joists may be different than otherjoists, but all of the joists may still have one or more apertures inthe joist shoe. Moreover, it should be understood that the presentinvention reduces the number of joist markings required. That is, thejoist markings (e.g., markings made by the manufacturer of the joists toidentify different joists for assembly) may be minimized to two types ofjoists (e.g., when different column joists are required, or the like)for the panelized systems. Alternatively, in some embodiments all of thejoists may be the same for the panelized systems, and thus, no joistmarkings may be required. By utilizing joist shoes with one or morejoist apertures on all of the joists of the panelized systems, thenumber of joists (and joist markings) may be minimized regardless ofwhether or not different joists are required at column locations in thestructure.

In some embodiments, the method 700 involves assembling bridging betweenthe joists of the panelized assembly (e.g., erecting bridging), asindicated by block 720. In some embodiments, bridging is assembledbetween two or more of the joists comprising the first joist, the secondjoist and the one or more intermediate joists. The bridging may be anytype of member, such as bars (circular, square, or any other type ofshape), one or more angles (e.g., L-shaped, u-shaped, c-shaped, or thelike), or any other type of member that is used to operatively coupledtwo different joists together (e.g., two adjacent joists, or the like).

Next, as indicated by block 730, the structural decking panels and/orother components may then be operatively coupled (e.g., assembled) withthe plurality of joists of the panelized system and/or each other usinga suitable joining method (e.g., using a connector 15 illustrated inFIG. 1D, using fasteners, welding, shearing a sidelap, or the like).Alternatively, or in addition, to assembling the structural deckingpanels before lifting the panelized system 101, it should be understoodthat some of the structural decking panels may be installed afterlifting the panelized system into place, either before, after or duringwelding the toes 42 of the one or more intermediate joists 16 b (as isindicated by block 780 later on).

In this manner, the panelized system 101 may be constructed inaccordance with some embodiments of the invention. The panelized systemmay be associated with a roof portion, a floor portion, or a wallportion, or combination thereof and/or other components of a structureor building. As discussed, forming the panelized system typicallyinvolves completing the panelized system 101 as indicated by steps710-720 and/or step 730 (and/or additional steps, such as attachingother components). As discussed, in some embodiments, at least some ofthe plurality of joists (one or more of the first joist, second joistand/or the one or more intermediate joists), the bridging and/or thestructural decking panels are assembled within a jig (or one or morejigs) for forming the panelized system 101.

Next, the method involves hoisting or lifting the panelized system 101onto the structure or building (e.g., utilizing a crane to lift thepanelized assembly onto a structure, such as a building), as indicatedby block 740. In some embodiments, a spreader bar is employed to attachthe joists to the crane, which allows lifting of the panelized systemfrom two or more of the joists (e.g., adjacent the center of the joists)in order to distribute lifting loads.

Subsequently, after lifting the panelized assembly onto the structure,in some embodiments, the corners of the panelized assembly may be boltedor otherwise fastened for safety. Here, the first joist and/or thesecond joist may be bolted down to a corresponding support member of thestructure, at, at least one aperture of at least one corresponding joistseat, thereby allowing the first joist and/or the second joist to serveas an edge of the installed panelized system.

For example, after lifting the panelized assembly onto the structure,the first joist may be assembled to a corresponding proximate supportmember (e.g., one or more beams or support member 12 of FIG. 1B) of thestructure, as indicated by block 750. In some embodiments, the firstjoist may be assembled to the support member through the use of afastener (e.g., bolt, nut, stud, or the like) at an aperture of a joistseat of the first joist. It is contemplated that in other embodiments,the first joist may be assembled through welding (e.g., spot welding,welding the toe, welding the one or more apertures) or other joiningprocesses.

Similarly, the method involves assembling or operatively coupling atleast the second joist to a corresponding proximate support member(e.g., one or more beams or support member 12 of FIG. 1B), as indicatedby block 760, in accordance with some embodiments of the invention. Insome embodiments, the second joist may be assembled through the use of afastener (e.g., bolt, nut, stud, or the like) at an aperture of a joistseat of the second joist. It is contemplated that in other embodiments,the second joist may be assembled through welding (e.g., spot welding,welding the toe, welding the one or more apertures) or other joiningprocesses.

Operatively coupling the one or more apertures of the end joist seats ofthe end joists to the support members provides structural support toallow for installers to walk on the installed panelized system duringadditional assembly (e.g., assembly of the intermediate joist shoes,additional decking assembly, and/or additional support members).Moreover, operatively coupling the one or more apertures of the endjoist seats also provides uplift capacity, shear capacity, and/or otherloading capacity with respect to environmental loading (e.g., wind,etc.) during the additional assembly processes.

Next, the method involves welding at least a toe of an intermediatejoist seat 30 of at least one intermediate joist (i.e., one or moreintermediate joists) to the one or more support members (e.g., tosupport member 12) of the structure, as indicated by block 770.Typically, as discussed with respect to FIGS. 2-6, the at least one toe44 is welded along predetermined length of anchorage or toe weld length“Lw” which is configured to provide the same (or greater) anchorage,uplift capacity and rollover capacity for the slotted type joist seat30, as that would be obtained for unslotted type joist seats or joistseats whose apertures are welded or otherwise operatively coupled to thesupport member. As such, the aperture weld (or other operative couplingssuch as fasteners) between an intermediate joist 30 the one or moresupport members are omitted. As previously discussed herein, it may bedifficult to access the one or more joist apertures (e.g., slottedapertures) in the joist seats when the panelized system 101 isinstalled, particularly in light of the assembled structural deckingpanels at least partially obscuring or impeding access to joistapertures (e.g., as illustrated at Region B of FIG. 1B). Moreover, itmay be difficult to weld inside the joist apertures (e.g., slottedapertures) when installed into a structure (or otherwise utilize toolingto make other connections at the joist apertures). As such, the presentinvention allows for formation of a weld only at the toe 42 of theintermediate joist seat 40, which will meet or exceed the upliftcapacity of the decking system, while making it much easier to installthe decking (e.g., easier to make a single toe weld on the intermediatejoist seat, compared to welding within the one or more apertures 44).The length of the toe weld may be determined and/or formed as previouslydescribed herein.

Next, as indicated by block 780, the structural decking panels 14 andother components may then be assembled with the plurality of joistsusing a suitable joining method (e.g., using fasteners, welding,shearing a sidelap, or the like). It should be understood that thedecking panels may be installed before, during, and/or after welding thetoes 42 of the one or more intermediate joists 16 b.

While the invention is described herein with respect to pre-formingpanelized systems before lifting the panelized systems into place in abuilding structure, it should be understood that the same conceptsdescribed herein (e.g., utilizing the same joist seats) may also beutilized when installing the individual components into a structure on acomponent by component basis (e.g., installing each joist into placewithin the structure).

FIG. 8 illustrates a schematic sectional view 800 of a joist seat 20, inaccordance with some embodiments of the invention. The sectional view800 also depicts a schematic free body diagram representing loading ofthe joist seat 20 in accordance with some embodiments of the invention.As discussed previously, the joist seat 20, in accordance with theseembodiments, may comprise a pair of angle portions (22, 24), each havinga toe 42. The angle portions 22 and 24 are operatively coupled to eachother via the component 18. The angle portions (22, 24) comprise asubstantially “L” shaped cross section formed by first portions (22 a,24 a) and second portions (22 b, 24 b), respectively, as illustrated byFIG. 3. As such, the angle portions 22 and 24 are operatively coupled toeach other and to upper chords 26 via the component 18. However, asdiscussed previously, in other embodiments not illustrated herein, theangle portions (22, 24) may be integral with the upper chords 26 to forma substantially “C” shaped cross section. As illustrated in FIG. 8, eachof the angle portions 22 and 24 of the joist seat 20 may comprise awidth “Wj”, a height “Hj”, a length “Lj” (illustrated in FIG. 9) and athickness of “Tj”. The height of the angle portions (22, 24) togetherwith that of the upper chords 26 forms a height Hv.

Typically, load “V” of FIG. 8 represents the ultimate rollover force (orrollover capacity) required for a weld 160 at the toe 42 to yield underthe loading V. The force components “Ft” and “Fc” are equal and oppositeforces that result from the loading V. The force Ft is a tensioncomponent and the force Fc is a compression component forming a couple,which are separated by a couple length “m”. The ultimate rollover forceV will be described below. Typically, the value of tension andcompression components is directly proportional to the ultimate rolloverforce V and a ratio of the height Hv and couple length m:

${Ft} = {{V\frac{({Hv})}{(m)}} = {- {Fc}}}$

FIG. 9 illustrates a schematic top sectional view 900 of the joist seat20 illustrated in FIG. 8 at the section D-D, in accordance with someembodiments of the invention. Specifically FIG. 9 indicates a top viewof the angle portion 22 being operatively coupled with a correspondingsupport member by the weld 160 along the length K of the toe 42. Asdiscussed, the length “a” indicates the length of the moment arm fromthe toe 42 to the yield line. FIG. 9 also indicates the yield line alongwhich the angle portion 22 of the joist seat 20 would yield under theload. The length “n” indicates a distance between an inside edge of theangle portion 24 to an edge of a fillet of the angle portion 24.

Referring to FIGS. 8-9, as discussed previously with respect to FIGS.3-5, the ultimate uplift load P can be determined as:

$P = {2\frac{(M)({Ly})}{(a)}}$

Here, it is noted that the plastic moment capacity per unit length M canbe determined to be equal to a product of yield stress “Y” of a materialfrom which the angle portion 22 is constructed (e.g., steel) and aplastic section modulus of unit length “Z” of the angle portion 22,i.e., M=(Y)(Z). Moreover, the plastic section modulus of unit length Zis typically equal to a fourth of a square of the thickness Tj of theangle portion 22, i.e.,

$Z = {\frac{({Tj})^{2}}{4}.}$Moreover, it is noted that the length Ly of the yield line can bedetermined to be the lesser of (i) a sum of the length of weld K andperimeter of the curvature with radius a, i.e., (K+πa) and (ii) thelength Lj of the angle portion 22 of the joist shoe/seat 20. Moreover,the length a can be determined as a function of the thickness Tj suchthat (a)=2.3(Tj).

The distance between the tension and compression force components “m”can be determined by setting a moment resisted by the yield lines onethe tension and compression sides in equilibrium. Hence, the length mcan be determined to be about:m=1.25(W)+g+0.5(n)

Here, length “n” indicates a distance between an inside edge of theangle portion 24 to an edge of a fillet of the angle portion 24 and thelength “g” is a distance between the angle portions 22 and 24, i.e., thewidth of component 18. Consequently, based equilibrium of forces, theultimate roll over force V can be determined to be:

$V = {\frac{(M)({Ly})}{(a)} \cdot \frac{(m)}{({Hv})}}$

In the second scenario discussed earlier, involving a slotted type angleportion having an aperture 44 which is not welded or otherwiseoperatively coupled or fastened, the uplift rollover capacity V can bedetermined using the relation above with respect to an increased yieldline length Ly for the slotted type angle portion and with respect tothe larger moment arm a2 described above, as follows:

$V_{slotted} = {\frac{(M)({Ly})_{slotted}}{\left( {a\; 2} \right)} \cdot \frac{(m)}{({Hv})}}$

Hence, based on the length of the moment arm a2 for a slotted type angleportion and the predetermined length of anchorage “Lw” (“predeterminedlength of weld” or “toe weld length”) of the toe 44 which is configuredto provide the same (or greater) anchorage with respect to unslottedtypes, as discussed above, the uplift rollover capacity V for slottedtype angle portions is the same as or greater than that would beobtained for unslotted type angle portions (e.g., no aperture within theangle portion, or for an angle portion whose slots are welded orotherwise operatively coupled to the support member).

In some embodiments, the uplift rollover capacity V of the weld 160 maybe about 4.18, 5.24, 6.20, 7.11, 7.35, 8 kip (kilo pound force), in therange of 4.18-6.70, 4.39-7.35, 0.69-10, 1-6, 5.02-12, 4.01-18, 7.0-14.5kip (kilo pound force), or outside, or in-between, or overlapping theseranges, or any number within these ranges. Although determined aboveusing “yield line model”, in other embodiments, the uplift rollovercapacity V is determined using other models such as an elastic model andan ultimate strength model.

It should be understood that “operatively coupled,” when used herein,means that the components may be formed integrally with each other, ormay be formed separately and coupled together. Furthermore, “operativelycoupled” means that the components may be formed directly to each other,or to each other with one or more components located between thecomponents that are operatively coupled together. Furthermore,“operatively coupled” may mean that the components are detachable fromeach other, or that they are permanently coupled together.

While certain exemplary embodiments have been described and shown in theaccompanying drawings, it is to be understood that such embodiments aremerely illustrative of and not restrictive on the broad invention, andthat this invention not be limited to the specific constructions andarrangements shown and described, since various other changes,combinations, omissions, modifications and substitutions, in addition tothose set forth in the above paragraphs, are possible. Those skilled inthe art will appreciate that various adaptations, modifications, andcombinations of the just described embodiments can be configured withoutdeparting from the scope and spirit of the invention. Therefore, it isto be understood that, within the scope of the appended claims, theinvention may be practiced other than as specifically described herein.

Also, it will be understood that, where possible, any of the advantages,features, functions, devices, and/or operational aspects of any of theembodiments of the present invention described and/or contemplatedherein may be included in any of the other embodiments of the presentinvention described and/or contemplated herein, and/or vice versa. Inaddition, where possible, any terms expressed in the singular formherein are meant to also include the plural form and/or vice versa,unless explicitly stated otherwise. Accordingly, the terms “a” and/or“an” shall mean “one or more.”

What is claimed is:
 1. A panelized system for a structure, wherein thesystem comprises: a plurality of joists operatively coupled to eachother, each of the plurality of joists comprising a joist seat having atleast one angle, the angle comprising a toe and a single slotted joistaperture in the angle; wherein the joist seat of at least one of theplurality of joists is structured to be operatively coupled to a supportmember of the structure using a toe weld between the toe and the supportmember, wherein no connection is made between the slotted joist apertureand the support member, and wherein the toe weld is continuous and has atoe weld length that is greater than an aperture length of the slottedjoist aperture.
 2. The system of claim 1, wherein the plurality ofjoists comprise: two end joists; and one or more intermediate joists;wherein the slotted joist aperture of each of the two end joists areconfigured for operative coupling to the support member through the useof an aperture connection; and wherein no connection is made between theslotted joist aperture of the one or more intermediate joists.
 3. Thesystem of claim 1, wherein the toe weld is formed after the panelizedsystem is hoisted onto the structure.
 4. The system of claim 1, whereinthe toe weld length is configured to provide at least a predeterminedultimate uplift strength to the joist seat, wherein the predeterminedultimate uplift strength is an ultimate uplift strength obtained if theaperture connection between the slotted joist aperture and the supportmember is made.
 5. The system of claim 4, wherein the toe weld length isequal to at least about two times the aperture length of the slottedjoist aperture.
 6. The system of claim 1, wherein the plurality ofjoists are operatively coupled to each other through bridging.
 7. Thesystem of claim 1, further comprising: structural decking operativelycoupled to the plurality of joists, wherein the structural decking maybe operatively coupled to the plurality of joists before or afterforming the toe weld.
 8. A building structure, wherein the buildingstructure comprises: two or more support members; and a plurality ofjoists, each of the plurality of joists comprising a joist seat havingat least one angle, the angle comprising a toe and a single joistaperture; wherein a first joist of the plurality of joists has a firstjoist seat that is operatively coupled to a support member of the two ormore support members through a first aperture connection between a firstjoist seat aperture and the support member; wherein a second joist ofthe plurality of joists has a second joist seat that is operativelycoupled to the support member through a second aperture connectionbetween a second joist seat aperture and the support member; and whereinone or more intermediate joists of the plurality of joists each have anintermediate joist seat that is operatively coupled to the supportmember using a toe weld between the toe of of the intermediate joistseat and the support member, wherein no connection is made between anintermediate joist seat aperture and the support member, and wherein thetoe weld is continuous and has a toe weld length that is greater than anaperture length of the intermediate joist seat aperture.
 9. The buildingstructure of claim 8, wherein the joist aperture is a slotted joistaperture, and wherein the toe weld length of the toe weld is greaterthan the aperture length of the slotted joist aperture.
 10. The buildingstructure of claim 9, wherein the toe weld length is configured toprovide at least a predetermined ultimate uplift strength to theintermediate joist seat of the one or more intermediate joists, whereinthe predetermined ultimate uplift strength is the ultimate upliftstrength obtained if an intermediate aperture connection between theintermediate joist seat aperture and the support member is made.
 11. Thebuilding structure of claim 10, wherein the toe weld length is equal toat least about two times the aperture length of the slotted joistaperture.
 12. A method for forming a structural decking system using apanelized system, the method comprising: constructing the panelizedsystem comprising a plurality of joists, wherein each of the pluralityof joists comprise a joist seat having at least one angle, the anglecomprising a toe and a single joist aperture in the angle, wherein theplurality of joists comprises a first end joist, a second end joist andone or more intermediate joists; hoisting the panelized system onto astructure comprising one or more support members; assembling the firstend joist of the plurality of joists to a support member of the one ormore support members using a first end joist seat, wherein assemblingthe first end joist comprises making a first aperture connection betweena first joist seat aperture and the support member; assembling thesecond end joist of the plurality of joists to a support member of theone or more support members using a second end joist seat, whereinassembling the second end joist comprises making a second apertureconnection between a second joist seat aperture and the support member;and assembling the one or more intermediate joists of the plurality ofjoists to the support member of the one or more support members betweenthe first end joist and the second end joist; wherein assembling the oneor more intermediate joists comprises forming a toe weld between the toeof an intermediate joist of the one or more intermediate joists to thesupport member of the one or more support members, and wherein noconnection is made between an intermediate joist seat aperture and thesupport member of the one or more support members, and wherein the toeweld is continuous and has a toe weld length that is greater than anaperture length of the intermediate joist seat aperture.
 13. The methodof claim 12, wherein the intermediate joist seat aperture is anintermediate slotted joist seat aperture, and wherein a toe weld lengthof the toe weld is greater than an intermediate aperture length of theintermediate slotted joist seat aperture, and wherein the told weld isformed after the panelized system is hoisted onto the structure.
 14. Themethod of claim 12, wherein the toe weld length is configured to provideat least a predetermined ultimate uplift strength to the intermediatejoist seat, wherein the predetermined ultimate uplift strength is anultimate uplift strength obtained if the an intermediate apertureconnection between the intermediate joist seat aperture and the supportmember is made.
 15. The method of claim 14, wherein the toe weld lengthis equal to at least about two times an intermediate aperture length ofthe intermediate joist seat aperture.
 16. The method of claim 12,wherein the method further comprises: assembling bridging between two ormore of the plurality of joists.
 17. The method of claim 12, wherein themethod further comprises: assembling one or more structural deckingpanels to one or more of the plurality of joists.
 18. A method forforming a structural decking system using a panelized system, the methodcomprising: constructing the panelized system comprising a plurality ofjoists, wherein each of the plurality of joists comprise a joist seathaving at least one angle, the angle comprising a toe and a single joistaperture in the angle; hoisting the panelized system onto a structurecomprising one or more support members; assembling at least a firstjoist from the plurality of joists to the one or more support membersusing a first joist seat, wherein assembling the first joist comprisesmaking an aperture connection between a first joist seat aperture of thefirst joist seat and a support member of the one or more supportmembers; and assembling at least a second joist from the plurality ofjoists to the one or more support members using a second joist seat,wherein assembling the second joist comprises forming a toe weld betweenthe toe of the second joist seat to the support member of the one ormore support members, wherein no connection is made between a secondjoist seat aperture and the support member of the one or more supportmembers, and wherein the toe weld is continuous and has a toe weldlength that is greater than an aperture length of the second joist seataperture.